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<title>Componentdef Task</title>
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<body>

<h2 id="componentdef">componentdef</h2>
<h3>Description</h3>
<p>Adds a component definition to the current project.  A component definition is the same as
a <a href="typedef.html">typedef</a> except:</p>
<ol>
  <li>that it can only be used in other types or tasks that accept components (by having
    an <code>add()</code> method).</li>
  <li>multiple components may have the same name, provided they implement different interfaces.</li>
</ol>
<p>The purpose of this is to allow internal Apache Ant definitions to be made for tags
like <samp>and</samp> or <samp>or</samp>.</p>

<h3>Examples</h3>

<p>Define two components with the same name <samp>or</samp>; one is a
condition (see <a href="conditions.html">conditions</a>) and one is a
selector (see <a href="../Types/selectors.html">selectors</a>).</p>
<pre>
&lt;componentdef name="or" onerror="ignore"
              classname="com.apache.tools.ant.taskdefs.conditions.Or"/&gt;
&lt;componentdef name="or" onerror="ignore"
              classname="com.apache.tools.ant.types.resources.selectors.Or"/&gt;</pre>
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